Stylus pen



FIG. 1 is a top front right perspective view of a stylus pen showing my new design;

FIG. 2 is a bottom front right perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof, wherein the left side elevation view is a mirror image of the right side elevation view;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

CLAIM The ornamental design for a stylus pen, as shown and described. 